Numbers We Use in Digital Electronics

The binary number 101010 equals 25 in decimal.

False

The hexadecimal number system uses 18 symbols.

False

Digital electronic devices use a number system called the binary number system.

True

Generally the weight or value of each place in the binary number system is referred to as a power of two.

True

What is the octal equivalent to the decimal number 15?

17

Hexadecimal notation is widely used in microprocessor-based systems to represent 4-, 8-, 16-, 32-, or 64- bit binary numbers.

True

In the hexadecimal number system, the letter A stands for decimal ten.

True

Octal numbers are also referred to as base eight numbers.

True

The octal number system uses 8 symbols.

True

A code that uses symbols to refer to a number of items is called

a number system

The device that translates from keyboard decimal numbers to binary is called

an encoder

The binary number system is sometimes called the

base 2 system

The binary number 1011 is equal to the decimal number

11

What is the decimal equivalent for the hexadecimal number 2F?

47

Which of the following is an advantage of the octal number system?

it is used extensively to convert directly from a3-bit binary number

When working with a varied number systems, what type calculator should be used?

scientific

Calculators and computers understand only decimal numbers.

False

The decimal number system uses only two symbols 0 and 1.

False

A 64-bit group of data is called a nibble.

False

A quad-word contains 64 bits.

True

A word contains

16 bits

What is the decimal equivalent to the hexadecimal number FF?

255

In computer software, to encode means to convert encrypted codes into readable numbers or text.

False

In modern electronic systems, the encoding and decoding may be performed only by software.

False

A decoder is a logic device that translates from binary code to decimal.

True

The binary number 1100 represents the decimal number 12.

True

An 8-bit binary number is called a bit.

False

Analog electronic devices use a number system called binary.

False

The hexadecimal number system uses 10 symbols.

False

A single binary number (either a 0 or a 1) is called a

bit.

The repeated divide-by-2 process is used when you want to convert

decimal to binary